<template>
    <div>
          <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 按钮 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表 -->
        <el-table :data="rolelist" boeder stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                   <el-row :class="['dbbottom',i1 === 0 ? 'dbtop': '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                       <!-- 渲染一级权限 -->
                       <el-col :span="5">
                           <el-tag closable>{{item1.authName}}</el-tag>
                           <i class="el-icon-caret-right"></i>
                           </el-col>
                       <!-- 渲染二，三级权限 -->
                       <el-col :span="19">
                           <el-row :class="[i2 === 0 ?'':'dbtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable>
                                        {{item2.authName}}
                                    </el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col> 
                        <el-col :span="18">
                             <el-tag   type="warning" v-for="(item3,i3) in 
                             item2.children" :key="item3.id"  closable 
                             @close="removeRightById(scope.row,item3.id)">
                                {{item3.authName}}
                             </el-tag>
                        </el-col>
                           </el-row>
                       </el-col>
                      
                   </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
             <el-table-column label="操作" width="300px">
                 <template slot-scope="scope">
                     <el-button  size="mini" type="primary" icon="el-icon-search">编辑</el-button>
                     <el-button  size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                     <el-button  size="mini" type="warning" icon="el-icon-setting" @click="showRightDialogVisible(scope.row)">分配权限</el-button>
                 </template>
             </el-table-column>
        </el-table>
        </el-card>
        <el-dialog
         title="分配权限"
         :visible.sync="setRightDialogVisible"
         width="50%"
         @close="setRightDialogClosed"
         >
         <!-- 树型结构数据 -->
       <el-tree :data="rightslist" :props="treeProps" @node-click="handleNodeClick" 
        show-checkbox  node-key="id" default-expand-all
         :default-checked-keys="defKeys" ref="treeRef"></el-tree>
       <span slot="footer" class="dialog-footer">
       <el-button @click="setRightDialogVisible = false">取 消</el-button>
       <el-button type="primary" @click="allotRights">确 定</el-button>
       </span>
       </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            rolelist:[],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            rightslist:[],
            treeProps:{
                label: 'authName',
                children: 'children'
            },
            defKeys:[105,116],
            rightId:''
        }
    },
    created(){
        this.getRoleList()
    },
    methods:{
       async getRoleList(){
           const {data : res} = await this.$http.get("roles")
           if(res.meta.status !== 200){
               return this.$message.error("获取角色列表失败")
           }
           this.rolelist= res.data
           console.log(res.data)

       },
       async removeRightById(role,rightId){
          const confirmResult = await 
          this.$confirm(
          '此操作将永久删除该文件, 是否继续?', 
          '提示', 
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)

        if(confirmResult !== 'confirm'){
            return this.$message.info('取消了删除!')
        }
         const { data: res}= await this.$http.delete
         (
             `roles/${role.id}/rights/${rightId}`
        )

         if(res.meta.status !== 200){
             return this.$message.error('删除权限失败')
         }
        //  this.getRoleList()
        role.children = res.data

       },
    async showRightDialogVisible(role){
           this.rightId=role.id
            //    获取数据
           const {data:res}= await
           this.$http.get('rights/tree')

           if(res.meta.status !== 200){
               return this.$message.error('获取权限数据失败')
           }

           this.rightslist = res.data
           
           console.log(this.rightslist)

           this.getLeafKeys(role,this.defKeys)
           
           this.setRightDialogVisible = true
       },
        getLeafKeys(node, arr){
            // 没有children就是3级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                this.getLeafKeys(item,arr)
            });
        },
        setRightDialogClosed(){
            this.defKeys=[]
        },
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')

            const {data:res} = await  this.$http.post(`roles/${this.rightId}/rights`,{rids:idStr})

            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRoleList()
            this.setRightDialogVisible = false
        }  
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.dbtop{
    border-top: 1px solid #eee;

}
.dbbottom{
     border-bottom: 1px solid #eee;

}
.vcenter{
    display: flex;
    align-items: center;
}

</style>